Improve inheritance support in the CEF API (issue #1623).

- Support single parent inheritance in CEF API classes.
- Support non-virtual inheritance in CEF API classes.
- Support translation of CEF API sub-directories.
- Add test sub-directories for testing-only functionality that will be
  available to unit tests but not exposed via the binary distribution.
- Add unit tests for the translator tool.
- Fix parsing of template parameter types that include commas.

libcef_dll/ctocpp/browser_process_handler_ctocpp.h

@@ -28,11 +28,9 @@ class CefBrowserProcessHandlerCToCpp
     : public CefCToCpp<CefBrowserProcessHandlerCToCpp, CefBrowserProcessHandler,
         cef_browser_process_handler_t> {
  public:
-  explicit CefBrowserProcessHandlerCToCpp(cef_browser_process_handler_t* str)
-      : CefCToCpp<CefBrowserProcessHandlerCToCpp, CefBrowserProcessHandler,
-          cef_browser_process_handler_t>(str) {}
+  CefBrowserProcessHandlerCToCpp();
 
-  // CefBrowserProcessHandler methods
+  // CefBrowserProcessHandler methods.
   void OnContextInitialized() override;
   void OnBeforeChildProcessLaunch(
       CefRefPtr<CefCommandLine> command_line) override;
@@ -43,4 +41,3 @@ class CefBrowserProcessHandlerCToCpp
 
 #endif  // BUILDING_CEF_SHARED
 #endif  // CEF_LIBCEF_DLL_CTOCPP_BROWSER_PROCESS_HANDLER_CTOCPP_H_
-